Collema nigrescens (Huds.) DC.
Annotated by Daphne Stone, 5 2011.

Washington: Skamania County: Gifford Pinchot National Forest, Mt. Adams Ranger District, Bear Creek Improvement Thin, Unit 804259. Located on 6" QUGA4 20 meters at 360 degrees from sign; thallus in canopy 15' up at flag. Subpop located at 591868/5070292. Elev. 1290 ft.
591890E, 5070328N; T3N R8E S5
Datum: NAD 27. Uncertainty: 805 meters. Coordinate Source: TRS2LL.
Occurs in steep, SW facing QUGA4 grassland with a substantial basalt rock component. This habitat is hot, exposed, and very dry during summer months. The QUGA4 are scrubby, average about 7" in diameter, and are grouped in multi-trunked patches commonly derived from fire disturbances. They occupy a cover of 25%. Soils tend to be shallow, with exposed rock and rock outcrops common. The ground cover is dominated by graminids with CYEC dominant at 40%. Associated species: QUGA4, VIEL, HODI, CYEC, MAOR3, TOAR. Aspect: 180°. Slope: 55%. Topography: Slope. Light: Partially shaded. Water: Dry. Small thalli were found often associated with another sensitive lichen species, DEIN12, on weather-downed but live white oaks in the top 5' of canopies where the dominance of moss species in the lower canopies gives way to lichen colonization. Branch.

Greg Carey 060303_CONI8_08_21_11_GC_01, Aug 21, 2011
WTU, Barcode: WTU-L-025022